Saute diced onions for about 20 minutes in olive oil until translucent and soft. Add tomato paste and cook for 2-3 minutes. Put plum tomatoes in blender for a few seconds. Add tomatoes and garlic to pot with onions and paste.

In separate pan, brown eye round on all sides in a small amount of oil. Add meat to sauce and simmer slowly for 3 hours. Remove garlic cloves. Carve roast into thin slices and serve with bow ties and sauce. The large quantity of onions make this a sweet, delicious sauce.